Cisco AS5800 Especificaciones descargar pdf (Pagina 13)

NoteThissectiondescribesthemechanicalfunctionsofthesystem

componentsandemphasizestheimportanceoffollowingthecorrect

procedurestoavoidunnecessarycircuitcardfailures.Thissectionis

forbackgroundinformationonly.Refertothesection"Removingand

ReplacingaTrunkCard"forspecificproceduresregardingtheCT1

andCE1trunkcard.

Eachdialshelfcontrollercardandfeaturecardcontainsafemale

connectorwithwhichitconnectstoamaleconnectoronthesystem

backplane.Eachmalebackplaneconnectorcomprisesasetoftiered

pins,intwolengths.Thebackplanepinssendspecificsignalstothe

systemastheymakecontactwiththecardconnectors.Thesystem

assessesthesignalsitreceivesandtheorderinwhichitreceivesthem

todeterminewhateventisoccurringandwhattaskitneedstoperform,

suchasreinitializingnewinterfacesorshuttingdownremovedones.

Eachdialshelfcontrollercardandfeaturecardisdesignedwithtwo

ejectorleverstobeusedwhenyouinstallorremoveacard(see).The

functionoftheejectorleversistoalignandsecurelyseatthecard

connectorsinthebackplane.

Caution

Donotforcethedialshelfcontrollercardsorfeaturecardsintoaslot,asthis

candamagethebackplaneconnectorpinsiftheyarenotaligned

properlywiththecardconnectors.

NoteToavoiderroneousfailuremessages,youmustallowatleast

15secondsforthesystemtoreinitializeandnotecurrentinterface

configurationsbeforeyouremoveorinsertadialshelfcontrollercard

orfeaturecardinthedialshelf.

SafetyGuidelines

ThissectionprovidessafetyandESDpreventionguidelinestohelp

youavoidinjurytoyourselfandavoiddamagetotheequipment.The

followingsafetyguidelinesarerecommendedwhenworkingwithany

equipmentthatconnectstoelectricalpowerortelephonewiring:

• Locatetheemergencypoweroffswitchfortheroominwhichyou

areworkingbeforebeginninganyproceduresrequiringaccessto

thechassisinterior.

• Neverworkalonewhenpotentiallyhazardousconditionsexist.

• Neverassumethatpowerhasbeendisconnectedfromacircuit;

alwayscheck.

• Neverperformanyactionthatcreatesapotentialhazardtopeople

ormakestheequipmentunsafe.

• Carefullyexamineyourworkareaforpossiblehazardssuchas

moistfloors,ungroundedpowerextensioncables,andmissing

safetygrounds.

• Thisunitistobeinstalledinarestrictedaccessareain

accordancewitharticles11016,11017,and11018ofthe

NationalElectricCode,ANSI/NFPA70.

TelephoneWiringGuidelines

Thefollowingguidelinesarerecommendedwhenworkingwithany

equipmentthatisconnectedtotelephonewiringortoothernetwork

cabling:

• Neverinstalltelephonewiringduringalightningstorm.

• Neverinstalltelephonejacksinwetlocationsunlessthejackis

specificallydesignedforwetlocations.

• Nevertouchuninsulatedtelephonewiresorterminalsunlessthe

telephonelinehasbeendisconnectedatthenetworkinterface.

• Alwaysusecautionwheninstallingormodifyingtelephonelines.

PreventingElectrostaticDischargeDamage

Electrostaticdischarge(ESD)damagesequipmentandimpairs

electricalcircuitry.ESDoccurswhenprintedcircuitcardsare

improperlyhandledandresultsincompleteorintermittentfailures.

Thesystemfeaturecardsanddialshelfcontrollercardsconsistofa

printedcircuitboardthatisfixedinametalcarrier.Electromagnetic

interference(EMI)shielding,connectors,andejectorleversareintegral

componentsofthecarrier.Handlethecardsbytheircarrieredgesor

ejectorleversonly;nevertouchtheprintedcircuitry,cardcomponents,

orconnectorpins.

Althoughthemetalcarrierhelpstoprotecttheprintedcircuitryfrom

ESD,youshouldwearapreventiveantistaticstrapwheneverhandling

featurecardsordialshelfcontrollercards.Ensurethatthestrapmakes

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